TDG Architecture, Inc.

TDG Architecture, Inc. is a full-service architectural firm in Colorado Springs, CO, specializing in innovative and sustainable design for residential, commercial, and community-focused projects. The firm serves clients seeking thoughtful, client-driven solutions from initial concept through construction administration, with a strong emphasis on energy efficiency, environmental harmony, and long-term functionality. With over three decades of combined experience among its leadership team, TDG Architecture brings a deep commitment to design excellence and project integrity. The firm maintains a strong local presence and is highly rated with a 4.70 average from clients, reflecting consistent satisfaction across project types.

In May 2025, TDG Architecture officially merged with Compass Architecture in Colorado Springs, expanding its capabilities and team diversity to better serve a broader range of project needs. The firm’s approach centers on collaboration, sustainability, and responsiveness to client goals, ensuring designs are both practical and visionary. Founding principal Mark Tremmel, a licensed architect and LEED AP BD+C with over 30 years of experience, leads with a philosophy rooted in nature-inspired design and energy conservation. Sharon Allen, an architect and LEED AP with 25 years of experience, contributes expertise in commercial design and construction administration, while Elizabeth LaDuke brings additional architectural insight and professional rigor to the team.

Located at 101 N Cascade Ave Suite 400, the firm sits just a short walk from Penrose Library and the FedEx facility, nestled between North Cascade Avenue and West Kiowa Street. The office is within a five-minute drive of The UPS Store and YAMA Training and Wellness, situated in a well-connected corridor of downtown Colorado Springs.

TDG Architecture stands out for its well-optimized digital presence, with a website that search engines can easily interpret, and for the thorough, consistent documentation of its business information across online platforms. This visibility ensures clients and partners can reliably find and verify the firm’s credentials and services.

By blending decades of experience with a forward-thinking, sustainable design ethos, TDG Architecture continues to shape thoughtful, enduring spaces that reflect the natural beauty and evolving needs of Colorado Springs.